Floor-scraper.



F. J. DUNCAN.

FLOOR SOBAPBB.

APPLIOATION FILED 001:;26, 1912.

Patented Nov. 3, 1914.

2 SHEETS-SHEET 1 Ema/whorl iF'eadfizzzzcazz THE NORRIS PETERS CO.. FHOTWLITHQ. WASHINGTON. D, C.

F. J. DUNCAN.

FLOOR scmrm. APPLICATION FILED 0013.26, 1912. 1,1 15,517. Patented Nov. 3, 1914.

2 SHEETS-SHEET 2.

THE NORRIS PETERS C0. PHUlU-LlTH-l, WASHINGTON. D C.

NITED STATES PATENT OFFICE.

ram: J. DUNCAN, or LUDLOW FALLS, onro, ASSIGNOR T0 DUNCAN Enos. AND WRAY COMPANY, OF LUDLOW FALLS, OHIO, A COPAR'INERSHIIP.

rLoon-scnA'rEn.

Specification of Letters Patent.

Patented Nov. 3, 1914.

Application filed October 26, 1912. Serial No. 727,858.

To all whom it may concern:

Be it known that I, FRED J. DUNoAN, a citizen of the United States, residing at Ludlow Falls, in the county of Miami and State of Ohio, have invented certain new and useful Improvements in Floor-Scrapers, of which the following is a specification, reference being had therein to the accompanying drawing. a I I This invention relates to floor scrapers and the object of the invention is to provide a manually operated wheeled scraper which will be very simple in its construction and highly efficient in its operation; to provide a scraper of this kind which can be adjusted to give a draw out at different angles. and to cut close to the walls; and further, to "provide such a scraper with an operating handle which can be adjusted to eitherpull or push the scraper.

It is also an object of the invention to pro vide means'for utilizing a curved blade in connection with a scraper of this kind.

In the accompanying drawings, Figure 1 is a top, plan view of a scraper embodying my invention; Fig. 2 is a longitudinal, sectional view taken centra'lly'through, such a scraper; Fig. 3 is a section onthe line 00 w of Fig. 2 and looking in the direction of the arrows; and Fig. 4 is a detail view of the blade. 7

In these drawings I have illustrated one embodiment of my invention and have shown the same as comprising a truck or wheeled support on which is mounted a blade, preferably curved about asubstantially vertical axis and capable of adjustment about both a horizontal axis and a vertical axis relatively to said supporting wheels and have provided a handle for manipulating the device either by pulling or pushing. The particular embodiment of the invention which is here shown is, of course, chosen for the purpose ofillustration only and it will be underon a frame 3 having at its upper end a socket 4 to, receive oneend of. a vertical stud or pivot pin 5, which is fixed against movement relatively to said socket by a set screw 6.

Pivotally mounted on that portion of the stud 5 which projects above the frame3 is a frame 7 having at one {end downwardly andv forwardly projectingiarms 8 on which is mounted a blade holder 9. I Preferably the blade. holder is adjustable, about a horizontal axis to enable the angle of the blade to be regulated. This horizontal axis is shown as arranged close to the floor and, as here shown, the lower endsof the arms 8 are pro vided with/apertures to. receive pivot pins 10 adapted to enter sockets '11 in the .adjacentportions of. the blade holder 9. -;':This.

holder may be of anyjsuitable construction but is preferably designed for holding a blade in acurved position. To thisend incomprises two clamping members curved about a substantially vertical axis, it being understood that this axis varies'with :relation to. a vertical line as the holder is adjusted about its horizontal axis. The inner member of bearings 11 formed in thelower part thereof and extends upward to a point a consider able distance above the blade. The outer member, which is indicated at 13, fits against tlielower portion ofthe inner member 12 and the two parts are adapted to receive between them a blade 14: which is held in posi-v tion by screws or bolts 15 mounted in the tion during the operation of the scraper. In

the holder, which is indicated at 'l2, has the.

order to give. a better scrapin edge to the blade the cutting edge thereof 1s,"afterbei1ig ground, turned forward/or away from the bevel slightly, as indicated at 17. By forming such an edgeon a straight blade and then bending the blade this forwardly turned edge is braced against the cutting action and is rendered more durable than a corresponding edge on a straight blade. The cutting edge'of the blade is bowed upwardly or in other words is convexed as clearly shown in Fig. 4 of the drawings. he adjustment of the blade holder about its horizontal axis is preferably controlled by a bolt 18 extending through the inner member 12 of the blade holder at a point above the horizontal axis about which the holder is adjustable and also through an apertured lug 19 depending from the frame 7 and arranged between the arms 8. A spring 20 confined between the lug 19 J and the inner member 12 of the blade holder tends to move the holder toward a vertical position and is of sufficient strength to resist the force exerted upon the holder by the cutting actionduring the operation of the scraper. The bolt 18 may be provided with a hand wheel or knob 21 and also has a nut 22 mounted thereon and-arranged between ribs 23 on the rear of the lug 19 which hold the nut against turning. To adjust the blade holder in either direction pressure is exerted upon the upper portion of the member 12 to compress the spring and the bolt is then turned in one direction or the other to secure the desired adj ustment- The purposeof mounting a curved blade on a "truck is three-fold: In the first instance it matters not at'what angle the blade is positioned, there is always a lead-portion and a straight portion to said blade; in the second instance, by adjusting the blade about the horizontal axis the width of the cut is regulated; and, in the third instance,

. all jumping or chattering of the machine is avoided. Practice has demonstrated that when a straight blade is employed and is adjusted in a plane at right angles to the line of movement, much jumping and chattering is occasioned, and when the straight blade is adjusted at an angle to the line" of movement this jumping or chattering is reduced but not eliminated.

From the foregoing it will be observed that when the curved blade is set in a plane at substantially rightangl'es to the line of movement, both ends of the blade will constitute lead portions while the central portion of said blade will constitute a straight portion. In this position of the blade the entire cutting edge is in a position to scrape the floor. Should this blade be adjusted about its vertical axis, that end of the blade which extends in the direction of the line of movement constitutes the lead portion of the blade, and the remaining or rear portion of said blade constitutes the straight cutting portion. When this blade is adjusted about its horizontal axis, regardless of its position about its vertical axis, the amount of work done by said blade, or in other words the amount of actual cutting edge, will depend upon the vertical angle to which the blade is adjusted. By providing the'blade with a convex cutting edge it may be set at an inclination to the floor and still engage the floor throughout its length. When the blade is ina vertical plane only the central portion of the blade is performing its function and when the blade is tilted forwardly more of the cutting edge will be brought into play as will be readily understood.

Rigidly mounted on the upper end of the stud 5, which projects above the frame 7, is a supplemental frame 21 -having mounted at its forward end a pawl or locking device 25 ada'pted to-enter the spaces between teeth 26 arranged on the frame 7 near one end thereof and thus control the adjustment of the frame and the blade holder carried thereby about a vertical axis with relation to the truck or supporting wheels. The pawl is here shown as held in its position between the teeth by means of a spring 27. An operating handle 28 is connected with the frame for manipulating the scraper and is preferably mounted on the supplemental frame 24. As here shown it is pivotally connected to lugs 29 projecting upwardly from the opposite sides of the supplemental frame. A brace bar or link 30 is pivotally connected at one end to one end of the supplemental frame 24 and is pivotal] y connected at its other ends to a collar 31 adjustably mounted on the handle 28. By adjusting the collar along the handle the height at which the handle is supported may be regulated. Further, by moving the collar to a point near the lower end of the handle the latter can be swung across its pivotal center and into the position shown in Fig. 2 which enables the scraper to be'pushed instead of pulled. A

rod 32 may be'connected with the pawl 25 and extended upward along the handle 28 i into the position inwhich it can readily be manipulated by the operator to release the ipawl when he desires to adjust the frame relatively "to the supporting wheels.

The operation of the device will be readily understood from the foregoing description and it will be apparent that the blade can be readily adjusted about a horizontal axis to cause it to engage thefloor at the desired angle. This adjustment when had in combination with the curved blade enables a shearing cut of the desired width and angle to be had and these features, together with the forwardly turned cutting edge of the blade provides a very efficient scraper.

Further, it will be apparent that by adjusting the blade holder about a vertical axis with relation to the supporting wheels the horizontal angle of the out can be regullated and the edge of the cutter can. be

caused to project beyond the line of thesupporting wheels to enable the floorto be scraped close to the edge ofa wall or the like.

While I have shown and described one embodiment ofmy invention it will be understood that the same has been chosen for the purposes of illustration and that I do not desireto be limited to the :details of construction shown and described, for ,ob-- vious modifications will occur to a person.

tion, what I claim as new and desire to secureby Letters Patent, is

1. In a floor scraper, thecombination, with a frame, and wheels supporting the same, of a blade carried by said frame, curved about a substantially vertical axis and adjustable relatively to said frame about a horizontal axis. Y

2. In a floor scraper, the combination, with a frame, and wheels supporting the same, of a blade carried by said frame and adjustable relatively thereto about a horizontal axis, said blade having a convex cutting edge and being curved about a substan tially vertical axis. I 1

3. In a floor scraper, the combination with a truck, of a blade mounted on said truck to swing about a vertical-axis and curved about a substantially verticalaxis.

l. In a floor. scraper, the combinatlon with a truck, of a blade mountedon said.

truck to swing about a horizontal axis, and curved about a substantially vertical axis, said'blade being formed with a convex cutting edge.

5. In a floor scraper, the combination with a truck, of a blade mounted on said truck to swing about both a substantially vertical axis and a horizontal axls, and

curved about a substantially vertical axis.

6. In a floor scraper, the combination with a truck, ofa blade mounted on said truck to swing about both a substantially vertical axis and a horizontal axis, and curved about a substantially vertical axis, said blade being formed with a convex cutting edge,the edge being turned in the di rection of its cut.

7. In a scraper of the character described, the combination, with a truck, a frame mounted on said truck, and a blade carried by said frame, of a handle 'pivotally mounted .on said frame and movable into operative positions on either side of the vertical plane of its pivotal center, and a brace bar adj ustably connected'to said handle and said frame and arranged to brace said handle in each of its operative positions.

8. In a scraper of the character described, the combination, with a truck, a stud rigidly secured thereto, a frame pivotally mounted on said stud,,and a supplemental frame rigidly secured to said stud above said frame, of means forlocking said supplemental frame in adjusted positions relatively to said main frame, and a blade holder mounted on said frame.

9. In a scraper of the character described, the combination, with a truck, a stud rigidly secured thereto,a frame pivotally mounted on said stud, and a supplemental frame rigidly secured to said stud above said frame, of means for locking said supplemental frame in adjusted positions relatively to said main frame comprising a handle mounted on said supplemental frame, a locking device mounted on said supplemental frame, and an operating member connected'with said locking device and extending along said handle.

10. In a scraper of "the character de scribed, the combination with atruck, of a main frame pivotally mounted on said truck to swing in a horizontal plane, and a supplemental frame rigidly secured to sald truck above the main frame, of a rack connected with said main frame, and alocking device carried by the supplemental frame for engaging the rack'to lock the main frame in its adjusted position relative to the truck.

11. In a scraper of the character described, the combination with a truck, of a main framepivotally mounted on said truck toswing in a horizontal plane, and a supplemental frame rigidly secured to said truck above the main frame, of a rack connected with said mainframe, a spring actuateddog pivotally mounted on the supplemental frame for engaging the rack to lock the main frame in itsadjusted position relative to the truck, and means for manually releasing said dog. I v

f '12; In a scraper of the character de scribed, the combination with a truck, of a main frame pivotallymounted on said truck to swing in a horizontal plane, and a supplemental frame rigidly secured to said truck above the main frame, of a rack connected with said main frame, a spring actuated dog pivotally mounted on the supplemental frame for engaging the rack to-lock the main frame in its adjusted position relative to the truck, a handle mounted on said supplemental frame and an operating member connected with said dog and extending along the handle.

13. In a scraper, a wheeled truck, a frame mounted on said truck for movement about a vertical axis and having forwardly and downwardly extending arms, a, blade holder Intestimony whereof I affix my signature supported on said arms, the loWer portion in presence of two Witnesses. of said blade holder being pivotally mounted on the lower ends of said arms to move FRED DUNCAN about a horizontal axis, and means for'sev \Vitnesses:

curing said frame and said blade holder in, CHARLES L; PEARSON,

adjusted positions. HARRY C. KRATZER.

Copies of this patent may be obtained for five cents each,eby addressing the Commissioner of Patents,

1 Washington, I). G. 

